Brake-chain drum.



W. S. ATWOOD.

g BRAKE CHAIN DRUM. APPLICATION FILED NOV. 9, 1914.

Pai zented Feb. 22,1916.

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THE COLUMBIA PLANOGRAPH 00., WASHINGTON. D. c.

pivrrnn snares earner enrich WILLIAM S. ATWOOD, OF MONTREAL, QUEBEC, CANADA.

BRAKE-CHAIN DRUM.

Application filed November 9, 1914.

To all whom it may concern:

Be it known that I, VVILLIAM S. A'rwoon, a citizen of the Dominion of Canada, and resident of the city of Montreal, in the Province of Quebec and Dominion of Canada, have invented certain new and useful Improvements in Brake-Chain Drums, of which the following is a full, clear, and exact description.

This invention relates to improvements in brake chain drums, and the object is to provide a drum which will give a train man quicker and better control of the brakes of a car.

A further object is to provide a drum of this character which may be inserted in a solid cast bracket, and will have a minimum of free play.

The device consists essentially of a drum of conical form provided at its larger end with chain attachin means The drum is preferably divided intermediate its ends to permit easy insertion in the supporting bracket and obviate the necessity of leaving a lot of free play for insertion.

In the drawings which illustrate the invention :Figure l is a front elevation of the device. Fig. .2 is a similar view showing the method of inserting or removoing the drum from the bracket. Fig. 3 is a perspective View of the drum parts.

Referring more particularly to the draw 5 designates the supporting bracket, and 6 the brake shaft the drum 7 is tapered toward the bottom, as clearly shown, and is provided at each end with chain retaining flanges 8, ilear the upper orlarger end a radially projecting lug 9 is provided, to which the end link of the chain may be attached. The drum is divided intermediate its ends into two parts 10 and 11, which are separated on aplane inclined to the axis of the drum, as clearly shown, The large end of the drum 10 is shorter than the smaller part 11. r

The tapered form of the drum gives much greater circumference at one end, and a greater leverage at the opposite end, so that at the commencementof winding up the brake chain the slack may be taken up very rapidly on the large portion of the drum, and when the chain tightens and resistance Specification of Letters Patent.

Patented Feb. 22, 1916.

Serial No. 871,054.

increases, the chain is Wound on the small end of the drum so that the trainman may exert a much greater force. The drum being divided intermediate its ends on an inclined plane, may be readily inserted in or removed from the holding bracket by slightly raising the upper portion and then raising and tilting the lower portion to one side simultaneously. The upper portion of the drum carrying the chain attaching lug is most fre quently broken, and may be renewed independently without the necessity of renewing the whole drum.

Having thus described my invention, What I claim is 1. In combination, a rectangular supporting frame having two apertured sides, a br he chain drum held therebetween tapering from one end to the other and divided intermediate its ends in a plane inclined to the drum axis, and chain attaching means at the larger end of said drum, the apertured sides of the frame being spaced apart a distance less than the length of the tapering drum.

In combination, a chain drum c0mprising a body tapering from one end to the other and divided intermediate its ends into two portions of unequal length the shorter portion being at the large end of the drum, and chain attaching means mounted on said shorter portion, the apertured sides of the frame being spaced apart a distance less than the length of the tapering drum.

3. In combination, a brake chain drum comprising a body tapering from one end to the other and divided intermediate its ends into two portions of unequal length, the shorter being at the large end of the drum, said portions separating in a plane inclined to the axis of the drum, and chain attaching lug projecting from the shorter of said portions, the apertured sides of the frame being spaced apart a distance less than the length of the tapering drum.

In witness whereof, I have hereunto set my hand, in the presence of two witnesses.

WILLIAM S. ATIVOOD.

Witnesses S. R. W. ALLEN, G. M. MORELAND.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

